Visit the official CSI store or your Procore/Bluebeam portal today. Your future self—the one not staying up late chasing misnumbered specs—will thank you.
An of MasterFormat is not an official CSI product; CSI sells official licenses for digital access via their MasterFormat 2020 Digital Subscription (PDF and online viewer). However, many professionals create or download Excel spreadsheets that list the numbers, titles, and sometimes descriptions for easier sorting, filtering, or integration with estimating software.
The full MasterFormat list is a copyrighted product of the Construction Specifications Institute.
Each piece of work is assigned a 6-digit number and a title (e.g., 03 30 00 – Cast-in-Place Concrete ).

Visit the official CSI store or your Procore/Bluebeam portal today. Your future self—the one not staying up late chasing misnumbered specs—will thank you.
An of MasterFormat is not an official CSI product; CSI sells official licenses for digital access via their MasterFormat 2020 Digital Subscription (PDF and online viewer). However, many professionals create or download Excel spreadsheets that list the numbers, titles, and sometimes descriptions for easier sorting, filtering, or integration with estimating software.
The full MasterFormat list is a copyrighted product of the Construction Specifications Institute.
Each piece of work is assigned a 6-digit number and a title (e.g., 03 30 00 – Cast-in-Place Concrete ).
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